Diamond Hill(DHIL) - 2025 Q3 - Quarterly Results

Exhibit 99.1 FOR IMMEDIATE RELEASE: Investor Contact: Tom Line—Chief Financial Officer 614-255-5989 (tline@diamond-hill.com) DIAMOND HILL INVESTMENT GROUP, INC. REPORTS RESULTS FOR THIRD QUARTER 2025 AND DECLARES QUARTERLY AND SPECIAL DIVIDEND COLUMBUS, Ohio - October 30, 2025 -- Diamond Hill Investment Group, Inc. (Nasdaq: DHIL) today reported unaudited financial results for the third quarter of 2025. The following are selected highlights for the quarter ended September 30, 2025: "We are encouraged by the ...